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DIA [1.3K]
3 years ago
12

Hello humans~help me with these questions ​

Chemistry
2 answers:
lesya692 [45]3 years ago
7 0

Answer:

  • Cement is commonly used in making concrete for buildings and infrastructure. It can be your home which is currently build from concrete and restaurants, school etc, related to construction.

  • calcium carbonate is mainly used in making chalks for blackboards^ ^ and paint industries make use of calcium carbonate in making paints.
Mice21 [21]3 years ago
6 0

Answer:

<h2>#9</h2>

Ans) Cement is used as a binder in concrete. Which is used a basic material to make all sorts of construction like- building, roads, hospitals etc.

<h2>#10</h2>

Ans)

  • Calcium Carbonate is used as a very important construction material.
  • It is also used as an effective dietary calcium supplement.
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When 0.1M HCl is added to the following system at equilibrium: AgCl(s) Ag+ (aq)+ Cl– (aq) the point of equilibrium will shift to
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Le Chatelier's Principle says that when something disrupts the equilibrium, the system adjusts to minimize the effect of that disturbance. If 0.1 M HCl solution is added, this dissociates into H+ and Cl- ions, so there will be more Cl- ions in the system. This causes the reaction to go in the reverse direction (equilibrium shifts to the left) to reduce the amount of Cl-.
Since this also consumes Ag+ ions, the concentration of Ag+ (aq) will decrease.
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What mass of oxygen is needed to burn 54.0 grams of butane c4h10
Jobisdone [24]

The moles of oxygen required to burn Butane is 6 moles.

<h3>What is a Combustion Reaction?</h3>

A reaction in which fuel gets oxidised by an oxidising agent producing a large amount of heat is called a combustion reaction.

In this question

Butane is burnt with oxygen

Molar mass of C₄H₁₀ = (12.0×4 + 1.0×10) g/mol = 58.0 g/mol

Molar mass of O₂ = 16.0×2 g/mol = 32.0 g/mol

Balanced equation for the reaction:

2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O

Mole ratio C₄H₁₀ : O₂ = 2 : 13

The given mass = 54grams

moles = 54/58 = 0.93 moles

The mole of oxygen required =

0.93/ x = 2/13

0.93*13/2 = x

x = 6.045 moles

Therefore 6 moles of oxygen are required to burn Butane.

To know more about Combustion Reaction

brainly.com/question/12172040

#SPJ1

6 0
2 years ago
What are the elements in the "dip" of the periodic table called?
pogonyaev

Answer:

Transition metals are the elements

3 0
4 years ago
Why would soap be unable to get laundry completely clean in areas with hard water?
Vesna [10]

Answer:

Soaps behave differently in hard water than soft and it’s not good behavior. Soaps in soft water are able to function as a cleaning agent whereas soaps in hard water are not. The same amount of soap in soft water will form more suds than it will in hard water. This is because hardness minerals react and combine with soap.

Not Going To Be a Idiot. Hope This Helps.

Explanation:

8 0
3 years ago
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